//package my.sc.filter;
//
//import com.alibaba.fastjson.JSON;
//import org.springframework.cloud.gateway.filter.GatewayFilterChain;
//import org.springframework.cloud.gateway.filter.GlobalFilter;
//import org.springframework.core.Ordered;
//import org.springframework.core.io.buffer.DataBuffer;
//import org.springframework.http.HttpStatus;
//import org.springframework.http.server.reactive.ServerHttpRequest;
//import org.springframework.http.server.reactive.ServerHttpResponse;
//import org.springframework.stereotype.Component;
//import org.springframework.util.StringUtils;
//import org.springframework.web.server.ServerWebExchange;
//import reactor.core.publisher.Mono;
//
//import java.nio.charset.StandardCharsets;
//import java.util.HashMap;
//import java.util.Map;
//
///**
// * @author ：Q大侠
// * @date ：Created in 2022/11/22 18:05
// * @description：
// * @modified By：
// * @version:
// */
//@Component
//public class LoginFilter implements GlobalFilter, Ordered {
//    @Override
//    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//
//        ServerHttpRequest request = exchange.getRequest();
//        ServerHttpResponse response = exchange.getResponse();
//        //判断请求路径是否放行
//        String path = request.getPath().toString();
//        if ("/login".equals(path)){
//            return chain.filter(exchange);//放行
//        }
//        //获取请求头的token值
//        String token = request.getHeaders().getFirst("token");
//        if (StringUtils.hasText(token)){
//            //校验token是否有效
//            if("admin".equals(token)){
//                return chain.filter(exchange);//放行
//            }
//        }
//        //响应结果
//        //3.1设置状态码
//        response.setStatusCode(HttpStatus.UNAUTHORIZED);
//        //3.2封装返回数据
//        Map<String, Object> map = new HashMap<>();
//        map.put("msg", "未登录");
//        map.put("code", "NOTLOGING");
//
//        //3.3作JSON转换
//        byte[] bytes = JSON.toJSONString(map).getBytes(StandardCharsets.UTF_8);
//
//        //3.4调用bufferFactory方法,生成DataBuffer对象
//        DataBuffer buffer = response.bufferFactory().wrap(bytes);
//
//        //4.调用Mono中的just方法,返回要写给前端的JSON数据
//        return response.writeWith(Mono.just(buffer));
//    }
//
//    @Override
//    public int getOrder() {
//        return 0;
//    }
//}
